Integrate the Function F Over the Given Region $f ( x , y ) = x y$

Multiple Choice

Integrate the function f over the given region.
- $f ( x , y ) = x y$ over the rectangle $7 \leq x \leq 8,3 \leq y \leq 4$

A) $\frac { 105 } { 2 }$
B) $\frac { 105 } { 4 }$
C) 35
D) $\frac { 35 } { 2 }$